Question

Thực hiện phép tính :

a , 15 . ( - 2 ) . ( - 5 ) . ( - 6 )

b , 4 . 7 . ( - 11 ) . ( - 2 )

Answer 1

a)

15 . ( - 2 ) . ( - 5 ) . ( - 6 )

= [( 15 . ( - 2 )] . [( - 5 ) . ( - 6 )]

= - 30 . 30

= - 900

b)

4 . 7 . ( - 11 ) . ( - 2 )

= ( 4 . 7 ) . [( - 11 ) . ( - 2 )]

= 28 . 22

= 616 

Answer 2

a)15. (-2).(-5).(-6)

=(-30).(-5).(-6)

=150.(-6)

=-900

b)4.7.(-11).(-2)

=28.(-11).(-2)

=(-308).(-2)

=616

Answer 3

a , 15 . ( - 2 ) . ( - 5 ) . ( - 6 ) = ( - 30 ) . 30 = -90

b , 4 . 7 . ( - 11 ) . ( - 2 ) = 28 . 22 = 616

Answer 4

a , 15 . ( - 2 ) . ( - 5 ) . ( - 6 )

= - 30 . ( -5 ) . ( - 6 )

= 150 . ( - 6 )

= -900

b , 4 . 7 . ( - 11 ) . ( - 2 )

= 28 . ( - 11 ) . ( - 2 )

= - 308 . ( - 2 )

=  616

Answer 5

a)

15 . ( - 2 ) . ( - 5 ) . ( - 6 )

= [( 15 . ( - 2 )] . [( - 5 ) . ( - 6 )]

= - 30 . 30

= - 900

b) 4 . 7 . ( - 11 ) . ( - 2 )

= ( 4 . 7 ) . [( - 11 ) . ( - 2 )]

= 28 . 22

= 616 

Answer 6

a,

. 15 . ( -2 ) . ( -5 ) . ( -6 )

= -30 . (-5 . -6)

= -30 . 30

= -900

b,

 4 .7 . (- 11) . (- 2)

= 28 . (-11 . -2)

= 28 . 22

=616